Vectors and equilibrium

Written by Dr. Hamza Farooq (Physics)

Class 11 · Physics · 8 questions

Name: ____________________ Date: ____________

Two perpendicular vectors of magnitude 3 and 4 are added. The magnitude of the resultant is:
- A 1
- B 7
- C 5
- D 12
The dot product of two perpendicular vectors is:
- A Infinite
- B 1
- C 0
- D Their product
The magnitude of the cross product of two parallel vectors is:
- A A B
- B 1
- C A + B
- D Zero
A force of 10 N acts at 30 degrees to the horizontal. What is its horizontal component?
- A 5 N
- B 10 N
- C 17.3 N
- D 8.7 N
The first condition of equilibrium states that:
- A The net force is zero
- B Mass is constant
- C The net torque is zero only
- D Speed is always zero
The resultant of two forces of 6 N and 8 N acting at right angles is:
- A 10 N
- B 14 N
- C 48 N
- D 2 N
A vector quantity has:
- A Magnitude and direction
- B Magnitude only
- C Direction only
- D Neither
The torque of a force F at a perpendicular distance d is:
- A F + d
- B F d
- C d / F
- D F / d

Answer key

1. C, 2. C, 3. D, 4. D, 5. A, 6. A, 7. A, 8. B